Here is one written in Java: https://github.com/stefanhaustein/expressionparser https://github.com/stefanhaustein/expressionparser In addition to a simple math

Here is one written in Java: https://github.com/stefanhaustein/expressionparser https://github.com/stefanhaustein/expressionparser In addition to a simple math expression evaluator, examples include a BASIC interpreter and a simple computer algebra system O:)